CDB4392 Cirrus Logic Inc, CDB4392 Datasheet - Page 20

• Manufacturer Part Number: CDB4392
• Description: EVALUATION BOARD FOR CS4392
• Manufacturer: Cirrus Logic Inc

Specifications of CDB4392

• Number Of Dac's: 2
• Number Of Bits: 24
• Outputs And Type: 2, Differential
• Sampling Rate (per Second): 192k
• Data Interface: Serial
• Dac Type: Voltage
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -10°C ~ 70°C
• Utilized Ic / Part: CS4392
• Description/function: Audio D/A
• Operating Supply Voltage: 5 V
• Product: Audio Modules
• For Use With/related Products: CS4392
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant

6.2
6.2.1
6.2.2
6.2.3
20
SOFT
A = B
Soft Ramp Enable
Zero Cross Enable
Soft Ramp and Zero Cross Enable
0
0
1
1
7
Volume and Mixing Control (Address 02h)
Function:
Function:
Function:
Table 12. Soft Cross or Zero Cross Mode Selection
Channel A Volume = Channel B Volume (Bit 7)
Soft Ramp or Zero Cross Enable (Bits 6:5)
ATAPI Channel Mixing and Muting (Bits 4:0)
The AOUTA and AOUTB volume levels are independently controlled by the A and the B Channel Vol-
ume Control Bytes when this function is disabled. The volume on both AOUTA and AOUTB are de-
termined by the A Channel Volume Control Byte and the B Channel Byte is ignored when this function
is enabled.
Soft Ramp allows level changes, both muting and attenuation, to be implemented by incrementally
ramping, in 1/8 dB steps, from the current level to the new level at a rate of 1dB per 8 left/right clock
periods.
Zero Cross Enable dictates that signal level changes, either by attenuation changes or muting, will
occur on a signal zero crossing to minimize audible artifacts. The requested level change will occur
after a timeout period between 512 and 1024 sample periods (10.7 ms to 21.3 ms at 48 kHz sample
rate) if the signal does not encounter a zero crossing. The zero cross function is independently mon-
itored and implemented for each channel.
Soft Ramp and Zero Cross Enable dictates that signal level changes, either by attenuation changes
or muting, will occur in 1/8 dB steps and be implemented on a signal zero crossing. The 1/8 dB level
change will occur after a timeout period between 512 and 1024 sample periods (10.7 ms to 21.3 ms
at 48 kHz sample rate) if the signal does not encounter a zero crossing. The zero cross function is
independently monitored and implemented for each channel. See Table 12
The CS4392 implements the channel mixing functions of the ATAPI CD-ROM specification. See
Table 13 on page 21
ZERO
Soft
6
0
1
0
1
Changes to affect immediately
Zero Cross enabled
Soft Ramp enabled (default)
Soft Ramp and Zero Cross enabled
Zero Cross
5
Mode
ATAPI4
4
ATAPI3
3
ATAPI2
2
ATAPI1
1
CS4392
DS459PP3
ATAPI0
0